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Line 1... Line 1...
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1
#
2
# Copyright (c) 2005 Ondrej Palkovsky
2
# Copyright (c) 2005 Ondrej Palkovsky
3
# Copyright (c) 2006 Martin Decky
3
# Copyright (c) 2006 Martin Decky
4
# Copyright (c) 2008 Jakub Jermar
4
# Copyright (c) 2008 Jakub Jermar
5
# All rights reserved.
5
# All rights reserved.
6
#
6
#
Line 35... Line 35...
35
#include <arch/pm.h>
35
#include <arch/pm.h>
36
#include <arch/cpu.h>
36
#include <arch/cpu.h>
37
#include <arch/cpuid.h>
37
#include <arch/cpuid.h>
38
 
38
 
39
#define START_STACK	(BOOT_OFFSET - BOOT_STACK_SIZE)
39
#define START_STACK	(BOOT_OFFSET - BOOT_STACK_SIZE)
40
	
40
 
41
.section K_TEXT_START, "ax"
41
.section K_TEXT_START, "ax"
42
 
42
 
43
.code32
43
.code32
44
.align 4
44
.align 4
45
.global multiboot_image_start
45
.global multiboot_image_start
46
multiboot_header:
46
multiboot_header:
47
	.long MULTIBOOT_HEADER_MAGIC
47
	.long MULTIBOOT_HEADER_MAGIC
48
	.long MULTIBOOT_HEADER_FLAGS
48
	.long MULTIBOOT_HEADER_FLAGS
49
	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)	# checksum
49
	.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)  # checksum
50
	.long multiboot_header
50
	.long multiboot_header
51
	.long unmapped_ktext_start
51
	.long unmapped_ktext_start
52
	.long 0
52
	.long 0
53
	.long 0
53
	.long 0
54
	.long multiboot_image_start
54
	.long multiboot_image_start
55
 
55
 
56
multiboot_image_start:
56
multiboot_image_start:
57
	cld
57
	cld
58
	movl $START_STACK, %esp			# initialize stack pointer
58
	movl $START_STACK, %esp             # initialize stack pointer
59
	lgdtl bootstrap_gdtr			# initialize Global Descriptor Table register
59
	lgdtl bootstrap_gdtr                # initialize Global Descriptor Table register
60
 
60
	
61
	movw $gdtselector(KDATA_DES), %cx
61
	movw $gdtselector(KDATA_DES), %cx
62
	movw %cx, %es
62
	movw %cx, %es
63
	movw %cx, %ds							# kernel data + stack
63
	movw %cx, %ds                       # kernel data + stack
64
	movw %cx, %ss
64
	movw %cx, %ss
-
 
65
	
-
 
66
	#
65
	# Simics seems to remove hidden part of GS on entering user mode
67
	# Simics seems to remove hidden part of GS on entering user mode
66
	#  when _visible_ part of GS does not point to user-mode segment
68
	# when _visible_ part of GS does not point to user-mode segment.
-
 
69
	#
-
 
70
	
67
	movw $gdtselector(UDATA_DES), %cx
71
	movw $gdtselector(UDATA_DES), %cx
68
	movw %cx, %fs
72
	movw %cx, %fs
69
	movw %cx, %gs
73
	movw %cx, %gs
70
	
74
	
71
	jmpl $gdtselector(KTEXT32_DES), $multiboot_meeting_point
75
	jmpl $gdtselector(KTEXT32_DES), $multiboot_meeting_point
72
	multiboot_meeting_point:
76
	multiboot_meeting_point:
73
	
77
	
74
	movl %eax, grub_eax						# save parameters from GRUB
78
	movl %eax, grub_eax                 # save parameters from GRUB
75
	movl %ebx, grub_ebx
79
	movl %ebx, grub_ebx
76
	
80
	
-
 
81
	#
77
	# Protected 32-bit. We want to reuse the code-seg descriptor,
82
	# Protected 32-bit. We want to reuse the code-seg descriptor,
78
	# the Default operand size must not be 1 when entering long mode
83
	# the Default operand size must not be 1 when entering long mode.
-
 
84
	#
79
	
85
	
80
	movl $(INTEL_CPUID_EXTENDED), %eax  
86
	movl $(INTEL_CPUID_EXTENDED), %eax
81
 	cpuid
87
	cpuid
82
 	cmp $(INTEL_CPUID_EXTENDED), %eax
88
	cmp $(INTEL_CPUID_EXTENDED), %eax
83
	ja extended_cpuid_supported
89
	ja extended_cpuid_supported
84
		
90
	
85
		movl $extended_cpuid_msg, %esi
91
		movl $extended_cpuid_msg, %esi
86
		jmp error_halt
92
		jmp error_halt
87
	
93
	
88
	extended_cpuid_supported:
94
	extended_cpuid_supported:
89
	
95
	
90
	movl $(AMD_CPUID_EXTENDED), %eax
96
	movl $(AMD_CPUID_EXTENDED), %eax
91
	cpuid
97
	cpuid
92
	bt $(AMD_EXT_LONG_MODE), %edx
98
	bt $(AMD_EXT_LONG_MODE), %edx
93
 	jc long_mode_supported
99
	jc long_mode_supported
94
		
100
	
95
		movl $long_mode_msg, %esi
101
		movl $long_mode_msg, %esi
96
		jmp error_halt
102
		jmp error_halt
97
 
103
	
98
	long_mode_supported:
104
	long_mode_supported:
99
	
105
	
100
	bt $(AMD_EXT_NOEXECUTE), %edx
106
	bt $(AMD_EXT_NOEXECUTE), %edx
101
	jc noexecute_supported
107
	jc noexecute_supported
102
	
108
	
Line 106... Line 112...
106
	noexecute_supported:
112
	noexecute_supported:
107
	
113
	
108
	movl $(INTEL_CPUID_STANDARD), %eax
114
	movl $(INTEL_CPUID_STANDARD), %eax
109
	cpuid
115
	cpuid
110
	bt $(INTEL_FXSAVE), %edx
116
	bt $(INTEL_FXSAVE), %edx
111
 	jc fx_supported
117
	jc fx_supported
112
	
118
	
113
		movl $fx_msg, %esi
119
		movl $fx_msg, %esi
114
		jmp error_halt
120
		jmp error_halt
115
	
121
	
116
	fx_supported:
122
	fx_supported:
117
	
123
	
118
	bt $(INTEL_SSE2), %edx
124
	bt $(INTEL_SSE2), %edx
119
 	jc sse2_supported
125
	jc sse2_supported
120
	
126
	
121
		movl $sse2_msg, %esi
127
		movl $sse2_msg, %esi
122
		jmp error_halt
128
		jmp error_halt
123
	
129
	
124
	sse2_supported:
130
	sse2_supported:
125
	
131
 
126
#ifdef CONFIG_FB
-
 
127
	mov $vesa_init, %esi
132
#include "vesa_prot.inc"
128
	mov $VESA_INIT_SEGMENT << 4, %edi
-
 
129
	mov $e_vesa_init - vesa_init, %ecx
-
 
130
	rep movsb
-
 
131
 
133
 
132
	mov $VESA_INIT_SEGMENT << 4, %edi
-
 
133
	jmpl *%edi
-
 
134
	
-
 
135
	vesa_meeting_point:
-
 
136
	
-
 
137
	mov %esi, KA2PA(vesa_ph_addr)
-
 
138
	mov %di, KA2PA(vesa_height)
-
 
139
	shr $16, %edi
-
 
140
	mov %di, KA2PA(vesa_width)
-
 
141
	mov %bx, KA2PA(vesa_scanline)
-
 
142
	shr $16, %ebx
-
 
143
	mov %bx, KA2PA(vesa_bpp)
-
 
144
#endif	
-
 
145
	
134
	#
146
	# Enable 64-bit page translation entries - CR4.PAE = 1.
135
	# Enable 64-bit page translation entries - CR4.PAE = 1.
147
	# Paging is not enabled until after long mode is enabled
136
	# Paging is not enabled until after long mode is enabled.
-
 
137
	#
148
	
138
	
149
	movl %cr4, %eax
139
	movl %cr4, %eax
150
	btsl $5, %eax
140
	btsl $5, %eax
151
	movl %eax, %cr4
141
	movl %eax, %cr4
152
 
142
	
153
	# Set up paging tables
143
	# set up paging tables
154
	
144
	
155
	leal ptl_0, %eax
145
	leal ptl_0, %eax
156
	movl %eax, %cr3
146
	movl %eax, %cr3
157
	
147
	
158
	# Enable long mode
148
	# enable long mode
159
	
149
	
160
	movl $EFER_MSR_NUM, %ecx			# EFER MSR number
150
	movl $EFER_MSR_NUM, %ecx            # EFER MSR number
161
	rdmsr						# Read EFER
151
	rdmsr                               # read EFER
162
	btsl $AMD_LME_FLAG, %eax			# Set LME = 1
152
	btsl $AMD_LME_FLAG, %eax            # set LME = 1
163
	wrmsr						# Write EFER
153
	wrmsr                               # write EFER
164
	
154
	
165
	# Enable paging to activate long mode (set CR0.PG = 1)
155
	# enable paging to activate long mode (set CR0.PG = 1)
166
	
156
	
167
	movl %cr0, %eax
157
	movl %cr0, %eax
168
	btsl $31, %eax
158
	btsl $31, %eax
169
	movl %eax, %cr0
159
	movl %eax, %cr0
170
	
160
	
171
	# At this point we are in compatibility mode
161
	# at this point we are in compatibility mode
172
	
162
	
173
	jmpl $gdtselector(KTEXT_DES), $start64
163
	jmpl $gdtselector(KTEXT_DES), $start64
174
 
164
 
175
.code64
165
.code64
176
start64:
166
start64:
177
	movq $(PA2KA(START_STACK)), %rsp
167
	movq $(PA2KA(START_STACK)), %rsp
178
	movl grub_eax, %eax
-
 
179
	movl grub_ebx, %ebx
-
 
180
	
168
	
181
	cmpl $MULTIBOOT_LOADER_MAGIC, %eax			# compare GRUB signature
-
 
182
	je valid_boot
-
 
183
		
-
 
184
		xorl %ecx, %ecx					# no memory size or map available
-
 
185
		movl %ecx, e820counter
-
 
186
		
-
 
187
		jmp invalid_boot
-
 
188
		
-
 
189
	valid_boot:
-
 
190
		
-
 
191
		movl (%ebx), %eax				# ebx = physical address of struct multiboot_info
-
 
192
		
-
 
193
		bt $3, %eax					# mbi->flags[3] (mods_count, mods_addr valid)
-
 
194
		jc mods_valid
-
 
195
			
-
 
196
			xorq %rcx, %rcx
-
 
197
			movq %rcx, init
-
 
198
			jmp mods_end
-
 
199
		
-
 
200
		mods_valid:
-
 
201
		
-
 
202
		xorq %rcx, %rcx
-
 
203
		movl 20(%ebx), %ecx				# mbi->mods_count
-
 
204
		movq %rcx, init
-
 
205
		
-
 
206
		cmpl $0, %ecx
-
 
207
		je mods_end
-
 
208
		
-
 
209
		movl 24(%ebx), %esi				# mbi->mods_addr
169
	# call arch_pre_main(grub_eax, grub_ebx)
210
		movq $init, %rdi
-
 
211
		
-
 
212
		mods_loop:
-
 
213
			
-
 
214
			xorq %rdx, %rdx
170
	xorq %rdi, %rdi
215
			movl 0(%esi), %edx			# mods->mod_start
-
 
216
			movq $0xffff800000000000, %r10
-
 
217
			addq %r10, %rdx
-
 
218
			movq %rdx, 8(%rdi)
171
	movl grub_eax, %edi
219
			
-
 
220
			xorq %rdx, %rdx
172
	xorq %rsi, %rsi
221
			movl 4(%esi), %edx
173
	movl grub_ebx, %esi
222
			subl 0(%esi), %edx			# mods->mod_end - mods->mod_start
-
 
223
			movq %rdx, 16(%rdi)
-
 
224
			
-
 
225
			addl $16, %esi
-
 
226
			addq $16, %rdi
-
 
227
			
-
 
228
			loop mods_loop
-
 
229
			
-
 
230
		mods_end:
-
 
231
		
-
 
232
		bt $6, %eax					# mbi->flags[6] (mmap_length, mmap_addr valid)	
-
 
233
		jc mmap_valid
-
 
234
			
-
 
235
			xorl %edx, %edx
-
 
236
			jmp mmap_invalid
-
 
237
			
-
 
238
		mmap_valid:
-
 
239
		movl 44(%ebx), %ecx				# mbi->mmap_length
-
 
240
		movl 48(%ebx), %esi				# mbi->mmap_addr
-
 
241
		movq $e820table, %rdi
-
 
242
		xorl %edx, %edx
-
 
243
		
-
 
244
		mmap_loop:
-
 
245
			cmpl $0, %ecx
-
 
246
			jle mmap_end
-
 
247
			
-
 
248
			movl 4(%esi), %eax			# mmap->base_addr_low
-
 
249
			movl %eax, (%rdi)
-
 
250
			
-
 
251
			movl 8(%esi), %eax			# mmap->base_addr_high
-
 
252
			movl %eax, 4(%rdi)
-
 
253
			
-
 
254
			movl 12(%esi), %eax			# mmap->length_low
-
 
255
			movl %eax, 8(%rdi)
-
 
256
			
-
 
257
			movl 16(%esi), %eax			# mmap->length_high
-
 
258
			movl %eax, 12(%rdi)
-
 
259
			
-
 
260
			movl 20(%esi), %eax			# mmap->type
-
 
261
			movl %eax, 16(%rdi)
-
 
262
			
-
 
263
			movl (%esi), %eax			# mmap->size
-
 
264
			addl $0x4, %eax
-
 
265
			addl %eax, %esi
174
	call arch_pre_main
266
			subl %eax, %ecx
-
 
267
			addq $MEMMAP_E820_RECORD_SIZE, %rdi
-
 
268
			incl %edx
-
 
269
			jmp mmap_loop
-
 
270
		
-
 
271
		mmap_end:
-
 
272
		
-
 
273
		mmap_invalid:
-
 
274
		movl %edx, e820counter
-
 
275
		
-
 
276
	invalid_boot:
-
 
277
	
-
 
278
#ifdef CONFIG_SMP
-
 
279
	
-
 
280
	# copy AP bootstrap routines below 1 MB
-
 
281
	
-
 
282
	movq $BOOT_OFFSET, %rsi
-
 
283
	movq $AP_BOOT_OFFSET, %rdi
-
 
284
	movq $_hardcoded_unmapped_size, %rcx
-
 
285
	rep movsb
-
 
286
	
175
	
287
#endif
176
	call main_bsp
288
	
177
	
289
	call main_bsp   # never returns
178
	# not reached
290
	
179
	
291
	cli
180
	cli
292
	hlt
181
	hlt0:
293
 
-
 
294
#ifdef CONFIG_FB
-
 
295
.code32
-
 
296
vesa_init:
-
 
297
	jmp $gdtselector(VESA_INIT_DES), $vesa_init_real - vesa_init
-
 
298
	
-
 
299
.code16
-
 
300
vesa_init_real:
-
 
301
	
-
 
302
	mov %cr0, %eax
-
 
303
	and $~1, %eax
-
 
304
	mov %eax, %cr0
-
 
305
	
-
 
306
	jmp $VESA_INIT_SEGMENT, $vesa_init_real2 - vesa_init
-
 
307
	
-
 
308
vesa_init_real2:
-
 
309
	
-
 
310
	mov $VESA_INIT_SEGMENT, %bx
-
 
311
	
-
 
312
	mov %bx, %es
-
 
313
	mov %bx, %fs
-
 
314
	mov %bx, %gs
-
 
315
	mov %bx, %ds
-
 
316
	mov %bx, %ss
-
 
317
	
-
 
318
	movl $0x0000fffc, %esp
-
 
319
	movl $0x0000fffc, %ebp
-
 
320
	
-
 
321
#define VESA_INFO_SIZE 1024
-
 
322
 
-
 
323
#define VESA_MODE_ATTRIBUTES_OFFSET 0
-
 
324
#define VESA_MODE_LIST_PTR_OFFSET 14
-
 
325
#define VESA_MODE_SCANLINE_OFFSET 16
-
 
326
#define VESA_MODE_WIDTH_OFFSET 18
-
 
327
#define VESA_MODE_HEIGHT_OFFSET 20
-
 
328
#define VESA_MODE_BPP_OFFSET 25
-
 
329
#define VESA_MODE_PHADDR_OFFSET 40
-
 
330
 
-
 
331
#define VESA_END_OF_MODES 0xffff
-
 
332
 
-
 
333
#define VESA_OK 0x4f
-
 
334
 
-
 
335
#define VESA_GET_INFO 0x4f00
-
 
336
#define VESA_GET_MODE_INFO 0x4f01
-
 
337
#define VESA_SET_MODE 0x4f02
-
 
338
#define VESA_SET_PALETTE 0x4f09
-
 
339
 
-
 
340
#define CONFIG_VESA_BPP_a 255
-
 
341
 
-
 
342
#if CONFIG_VESA_BPP == 24
-
 
343
#define CONFIG_VESA_BPP_VARIANT 32
-
 
344
#endif
-
 
345
 
-
 
346
	mov $VESA_GET_INFO, %ax
-
 
347
	mov $e_vesa_init - vesa_init, %di
-
 
348
	push %di
-
 
349
	int $0x10
-
 
350
	
-
 
351
	pop %di
-
 
352
	cmp $VESA_OK, %al
-
 
353
	jnz 0f
-
 
354
	
-
 
355
	mov 2 + VESA_MODE_LIST_PTR_OFFSET(%di), %si
-
 
356
	mov %si, %gs
-
 
357
	mov VESA_MODE_LIST_PTR_OFFSET(%di), %si
-
 
358
	
-
 
359
	add $VESA_INFO_SIZE, %di
-
 
360
 
-
 
361
1:# Try next mode
-
 
362
	mov %gs:(%si), %cx
-
 
363
	cmp $VESA_END_OF_MODES, %cx
-
 
364
	jz 0f
-
 
365
	
-
 
366
	inc %si
-
 
367
	inc %si
-
 
368
	push %cx
-
 
369
	push %di
-
 
370
	push %si
-
 
371
	mov $VESA_GET_MODE_INFO, %ax
-
 
372
	int $0x10
-
 
373
	
-
 
374
	pop %si
-
 
375
	pop %di
-
 
376
	pop %cx
-
 
377
	cmp $VESA_OK, %al
-
 
378
	jnz 0f
-
 
379
	
-
 
380
	mov $CONFIG_VESA_WIDTH, %ax
-
 
381
	cmp VESA_MODE_WIDTH_OFFSET(%di), %ax
-
 
382
	jnz 1b
-
 
383
	
-
 
384
	mov $CONFIG_VESA_HEIGHT, %ax
-
 
385
	cmp VESA_MODE_HEIGHT_OFFSET(%di), %ax
-
 
386
	jnz 1b
-
 
387
	
-
 
388
	mov $CONFIG_VESA_BPP, %al
-
 
389
	cmp VESA_MODE_BPP_OFFSET(%di), %al
-
 
390
 
-
 
391
#ifdef CONFIG_VESA_BPP_VARIANT
-
 
392
	jz 2f
-
 
393
	
-
 
394
	mov $CONFIG_VESA_BPP_VARIANT, %al
-
 
395
	cmp VESA_MODE_BPP_OFFSET(%di), %al
-
 
396
#endif
-
 
397
	jnz 1b
-
 
398
	
-
 
399
2:
-
 
400
	
-
 
401
	mov %cx, %bx
-
 
402
	or $0xc000, %bx
-
 
403
	push %di
-
 
404
	mov $VESA_SET_MODE, %ax
-
 
405
	int $0x10
-
 
406
	
-
 
407
	pop %di
-
 
408
	cmp $VESA_OK, %al
-
 
409
	jnz 0f
-
 
410
 
-
 
411
#if CONFIG_VESA_BPP == 8
-
 
412
	
-
 
413
	# Set 3:2:3 VGA palette
-
 
414
	
-
 
415
	mov VESA_MODE_ATTRIBUTES_OFFSET(%di), %ax
-
 
416
	push %di
-
 
417
	mov $vga323 - vesa_init, %di
-
 
418
	mov $0x100, %ecx
-
 
419
	
-
 
420
	bt $5, %ax						# Test if VGA compatible registers are present
-
 
421
	jnc vga_compat
-
 
422
		
-
 
423
		# Try VESA routine to set palette
-
 
424
		
-
 
425
		mov $VESA_SET_PALETTE, %ax
-
 
426
		xor %bl, %bl
-
 
427
		xor %dx, %dx
-
 
428
		int $0x10
-
 
429
		
-
 
430
		jmp vga_not_compat
-
 
431
	
-
 
432
	vga_compat:
-
 
433
		
-
 
434
		# Try VGA registers to set palette
-
 
435
		
-
 
436
		movw $0x3c6, %dx				# Set palette mask
-
 
437
		movb $0xff, %al
-
 
438
		outb %al, %dx
-
 
439
		
-
 
440
		movw $0x3c8, %dx				# First index to set
-
 
441
		xor %al, %al
-
 
442
		outb %al, %dx
-
 
443
		
-
 
444
		movw $0x3c9, %dx				# Data port
-
 
445
		vga_loop:
-
 
446
			movb %es:2(%di), %al
-
 
447
			outb %al, %dx
-
 
448
			
-
 
449
			movb %es:1(%di), %al
-
 
450
			outb %al, %dx
-
 
451
			
-
 
452
			movb %es:(%di), %al
-
 
453
			outb %al, %dx
-
 
454
			
182
		hlt
455
			addw $4, %di
-
 
456
			loop vga_loop
-
 
457
		
-
 
458
	vga_not_compat:
-
 
459
	
-
 
460
	pop %di
-
 
461
	
-
 
462
#endif
-
 
463
	
-
 
464
	mov VESA_MODE_PHADDR_OFFSET(%di), %esi
-
 
465
	mov VESA_MODE_WIDTH_OFFSET(%di), %ax
-
 
466
	shl $16, %eax
-
 
467
	mov VESA_MODE_HEIGHT_OFFSET(%di), %ax
-
 
468
	mov VESA_MODE_BPP_OFFSET(%di), %bl
-
 
469
	xor %bh, %bh
-
 
470
	shl $16, %ebx
-
 
471
	mov VESA_MODE_SCANLINE_OFFSET(%di), %bx
-
 
472
	mov %eax, %edi
-
 
473
	
-
 
474
8:
-
 
475
	
-
 
476
	mov %cr0, %eax
-
 
477
	or $1, %eax
-
 
478
	mov %eax, %cr0
-
 
479
	
-
 
480
	jmp 9f
183
		jmp hlt0
481
9:
-
 
482
	
-
 
483
	ljmpl $gdtselector(KTEXT32_DES), $(vesa_init_protect - vesa_init + VESA_INIT_SEGMENT << 4)
-
 
484
	
-
 
485
0:# No prefered mode found
-
 
486
	mov $0x111, %cx
-
 
487
	push %di
-
 
488
	push %cx
-
 
489
	mov $VESA_GET_MODE_INFO, %ax
-
 
490
	int $0x10
-
 
491
	
-
 
492
	pop %cx
-
 
493
	pop %di
-
 
494
	cmp $VESA_OK, %al
-
 
495
	jnz 1f
-
 
496
	jz 2b						# Force relative jump
-
 
497
 
-
 
498
1:
-
 
499
	mov $0x0003, %ax
-
 
500
	int $0x10
-
 
501
	mov $0xffffffff, %edi				# EGA text mode used, because of problems with VESA
-
 
502
	xor %ax, %ax
-
 
503
	jz 8b						# Force relative jump
-
 
504
 
-
 
505
vga323:
-
 
506
#include "vga323.pal"	
-
 
507
	
-
 
508
.code32
-
 
509
vesa_init_protect:
-
 
510
	movw $gdtselector(KDATA_DES), %cx
-
 
511
	movw %cx, %es
-
 
512
	movw %cx, %ds					# kernel data + stack
-
 
513
	movw %cx, %ss
-
 
514
	# Simics seems to remove hidden part of GS on entering user mode
-
 
515
	#  when _visible_ part of GS does not point to user-mode segment
-
 
516
	movw $gdtselector(UDATA_DES), %cx
-
 
517
	movw %cx, %fs
-
 
518
	movw %cx, %gs
-
 
519
	
-
 
520
	movl $START_STACK, %esp				# initialize stack pointer
-
 
521
	
-
 
522
	jmpl $gdtselector(KTEXT32_DES), $vesa_meeting_point
-
 
523
	
-
 
524
.align 4
-
 
525
e_vesa_init:
-
 
526
#endif
-
 
527
 
184
 
528
# Print string from %esi to EGA display (in red) and halt
185
# Print string from %esi to EGA display (in red) and halt
529
error_halt:
186
error_halt:
530
	movl $0xb8000, %edi				# base of EGA text mode memory
187
	movl $0xb8000, %edi       # base of EGA text mode memory
531
	xorl %eax, %eax
188
	xorl %eax, %eax
532
	
189
	
533
	movw $0x3d4, %dx				# read bits 8 - 15 of the cursor address
190
	movw $0x3d4, %dx          # read bits 8 - 15 of the cursor address
534
	movb $0xe, %al
191
	movb $0xe, %al
535
	outb %al, %dx
192
	outb %al, %dx
536
	
193
	
537
	movw $0x3d5, %dx
194
	movw $0x3d5, %dx
538
	inb %dx, %al
195
	inb %dx, %al
539
	shl $8, %ax
196
	shl $8, %ax
540
	
197
	
541
	movw $0x3d4, %dx				# read bits 0 - 7 of the cursor address
198
	movw $0x3d4, %dx          # read bits 0 - 7 of the cursor address
542
	movb $0xf, %al
199
	movb $0xf, %al
543
	outb %al, %dx
200
	outb %al, %dx
544
	
201
	
545
	movw $0x3d5, %dx
202
	movw $0x3d5, %dx
546
	inb %dx, %al
203
	inb %dx, %al
547
	
204
	
548
	cmp $1920, %ax
205
	cmp $1920, %ax
549
	jbe cursor_ok
206
	jbe cursor_ok
-
 
207
	
550
		movw $1920, %ax				# sanity check for the cursor on the last line
208
		movw $1920, %ax       # sanity check for the cursor on the last line
-
 
209
	
551
	cursor_ok:
210
	cursor_ok:
552
	
211
	
553
	movw %ax, %bx
212
	movw %ax, %bx
554
	shl $1, %eax
213
	shl $1, %eax
555
	addl %eax, %edi
214
	addl %eax, %edi
556
	
215
	
557
	movw $0x0c00, %ax				# black background, light red foreground
216
	movw $0x0c00, %ax         # black background, light red foreground
558
	
217
	
559
	ploop:
218
	ploop:
560
		lodsb
219
		lodsb
561
		cmp $0, %al
220
		cmp $0, %al
562
		je ploop_end
221
		je ploop_end
563
		stosw
222
		stosw
564
		inc %bx	
223
		inc %bx
565
		jmp ploop
224
		jmp ploop
566
	ploop_end:
225
	ploop_end:
567
	
226
	
568
	movw $0x3d4, %dx				# write bits 8 - 15 of the cursor address
227
	movw $0x3d4, %dx          # write bits 8 - 15 of the cursor address
569
	movb $0xe, %al
228
	movb $0xe, %al
570
	outb %al, %dx
229
	outb %al, %dx
571
	
230
	
572
	movw $0x3d5, %dx
231
	movw $0x3d5, %dx
573
	movb %bh, %al
232
	movb %bh, %al
574
	outb %al, %dx
233
	outb %al, %dx
575
	
234
	
576
	movw $0x3d4, %dx				# write bits 0 - 7 of the cursor address
235
	movw $0x3d4, %dx          # write bits 0 - 7 of the cursor address
577
	movb $0xf, %al
236
	movb $0xf, %al
578
	outb %al, %dx
237
	outb %al, %dx
579
	
238
	
580
	movw $0x3d5, %dx
239
	movw $0x3d5, %dx
581
	movb %bl, %al
240
	movb %bl, %al
582
	outb %al, %dx
241
	outb %al, %dx
583
		
242
	
584
	cli
243
	cli
585
	hlt
244
	hlt1:
586
				
245
		hlt
-
 
246
		jmp hlt1
-
 
247
 
-
 
248
#include "vesa_real.inc"
587
 
249
 
588
.section K_INI_PTLS, "aw", @progbits
250
.section K_INI_PTLS, "aw", @progbits
589
 
251
 
590
#
252
#
591
# Macro for generating initial page table contents.
253
# Macro for generating initial page table contents.
592
# @param cnt	Number of entries to generat. Must be multiple of 8.
254
# @param cnt Number of entries to generat. Must be multiple of 8.
593
# @param g	Number of GB that will be added to the mapping.
255
# @param g   Number of GB that will be added to the mapping.
594
#
256
#
595
.macro ptl2gen cnt g 
257
.macro ptl2gen cnt g 
596
.if \cnt
258
.if \cnt
597
	ptl2gen "\cnt - 8" \g 
259
	ptl2gen "\cnt - 8" \g 
598
	.quad ((\cnt - 8) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
260
	.quad ((\cnt - 8) * 0x200000) + (\g * 1024 * 1024 * 1024) | (PTL_WRITABLE | PTL_PRESENT | PTL_2MB_PAGE)
Line 640... Line 302...
640
	.quad ptl_2_3g + (PTL_WRITABLE | PTL_PRESENT)
302
	.quad ptl_2_3g + (PTL_WRITABLE | PTL_PRESENT)
641
	.fill 506, 8, 0
303
	.fill 506, 8, 0
642
	# Mapping of [0; 1G) at -2G
304
	# Mapping of [0; 1G) at -2G
643
	.quad ptl_2_0g + (PTL_WRITABLE | PTL_PRESENT)
305
	.quad ptl_2_0g + (PTL_WRITABLE | PTL_PRESENT)
644
	.fill 1, 8, 0
306
	.fill 1, 8, 0
645
	
307
 
646
.align 4096
308
.align 4096
647
.global ptl_0
309
.global ptl_0
648
ptl_0:
310
ptl_0:
649
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
311
	.quad ptl_1 + (PTL_WRITABLE | PTL_PRESENT)
650
	.fill 255,8,0
312
	.fill 255,8,0